Cooling mechanism for aluminum profile extrusion forming die

Abstract

The invention relates to an aluminum profile extrusion forming die cooling mechanism which comprises a front die and a rear die, the rear die comprises an inner die block, an outer die block and a spacer block, a welding chamber and a working belt are arranged on the inner die block, the inner die block is connected with a water cooling mechanism, and the water cooling mechanism comprises a first cooling channel. The first cooling channel is arranged on the rear side of the welding chamber and annularly arranged on the outer side of the working belt, the spacer block is connected with an air cooling mechanism, the air cooling mechanism comprises a second cooling channel, and the air cooling mechanism forms an air thermal insulation layer in the spacer block through the second cooling channel. The rear mold is divided into three parts, the inner mold block is cooled through the water cooling mechanism, the cooling efficiency is improved, meanwhile, the air cooling mechanism forms an air thermal insulation layer in the spacer block through the second cooling channel, heat of the inner mold block is prevented from being transmitted to the outer mold block, the overall cooling efficiency of the rear mold is improved, and the cooling efficiency is improved. And cracks caused by non-uniform cooling of the rear mold can be prevented.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum profile processing equipment, and in particular to a cooling mechanism for an aluminum profile extrusion molding die. Background Art

[0002] During the extrusion process of aluminum profiles, temperature control of the mold and the metal inside the mold is the key to extrusion production, but the means of adjusting this temperature are limited. Currently, the only way to ensure that the temperature of the mold and the metal inside the mold is within the normal range is to adjust the preheating temperature of the extrusion barrel, extrusion billet, extrusion mold, appropriate production rhythm and extrusion speed.

[0003] In actual production, since the temperature of the metal near the working zone of the die outlet is the highest, measures such as reducing the extrusion speed and the initial temperature of the billet bar must be taken. Therefore, one of the existing solutions is to control the metal outlet temperature not to be too high, control the extrusion speed not to be too fast, and reduce the initial temperature of the billet bar. However, if the temperature of the metal at the die outlet is still too high, the operator can only reduce its temperature by water cooling, air blowing cooling or liquid nitrogen cooling at the die outlet.

[0004] A Chinese invention patent with authorization announcement number CN108480413A discloses a cooling mechanism for an aluminum extrusion mold, which uses cooling water and room temperature nitrogen to replace liquid nitrogen for mold cooling. However, this cooling method forms a nitrogen layer between the extrusion cavity and the inner wall of the die pad, which hinders heat transfer and reduces cooling efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a cooling mechanism for an aluminum profile extrusion die to solve the problems raised in the background technology.

[0006] The above-mentioned object of the present invention is achieved through the following technical scheme: a cooling mechanism for an aluminum profile extrusion mold, comprising a front mold and a rear mold, the front mold is provided with a mold core and a diversion hole, the rear mold comprises an inner module, an outer module arranged on the outside of the inner module and a spacer block arranged between the inner module and the outer module, the inner module is provided with a welding chamber and a working belt, the inner module is connected to a water cooling mechanism, the water cooling mechanism comprises a first cooling channel, the first cooling channel is arranged on the rear side of the welding chamber and is arranged around the outside of the working belt, the spacer block is connected to an air cooling mechanism, the air cooling mechanism comprises a second cooling channel, and the air cooling mechanism forms an air insulation layer in the spacer block through the second cooling channel.

[0007] Preferably, at least two first cooling channels are provided, which are spaced apart from each other in front and back.

[0008] Preferably, the water cooling mechanism also includes an upper connecting channel and a lower connecting channel, the upper connecting channel is arranged above the working belt and connected between the two first cooling channels, and a water outlet is arranged at the end of the upper connecting channel, and the lower connecting channel is arranged below the working belt and connected between the two first cooling channels, and a water inlet is arranged at the end of the lower connecting channel.

[0009] Preferably, a cache cavity is provided at the upper end of the first cooling channel, and the upper connecting channel is connected between the front and rear cache cavities.

[0010] Preferably, the cross-sectional shape of the first cooling channel is rectangular, the height of the first cooling channel gradually increases from the bottom of the working belt to the top, and the height of the first cooling channel located below the working belt is smaller than its width.

[0011] Preferably, the spacer block is an annular sleeve, the spacer block is sleeved on the outside of the inner module, and the second cooling channel is an annular groove concentric with the spacer block.

[0012] Preferably, the spacer block is provided with honeycomb holes, and the honeycomb holes radially penetrate from the second cooling channel to the inner wall of the spacer block.

[0013] Preferably, an air guide groove is provided on the outer wall of the inner module, and the air guide groove penetrates to the rear end surface of the inner module along the front-to-back direction, and the air guide groove is connected to the honeycomb holes at corresponding positions.

[0014] Preferably, the air cooling mechanism further includes an air inlet duct and an air outlet duct, the air inlet duct is connected to the lower end of the second cooling channel, the air outlet duct is connected to the upper end of the second cooling channel, and a pressure control valve is provided on the air outlet duct.

[0015] Beneficial effects of the present invention: The present invention divides the rear mold into three parts, wherein the inner module is cooled by a water cooling mechanism to improve the cooling efficiency, while the air cooling mechanism forms an air insulation layer in the spacer block through the second cooling channel to prevent the heat of the inner module from being transferred to the outer module, thereby improving the overall cooling efficiency of the rear mold and preventing the rear mold from cracking due to uneven cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of an embodiment of the present invention; Figure 2 is an exploded view of the rear mold in an embodiment of the present invention; Figure 3 is a cross-sectional view of a rear mold in an embodiment of the present invention; In the figure: 1-front mold, 101-diverter hole, 102-core, 2-rear mold, 201-inner module, 2011-welding chamber, 2012-working belt, 2013-first cooling channel, 2014-cache cavity, 2015-upper connecting channel, 2016-lower connecting channel, 2017-water inlet, 2018-water outlet, 2019-air guide groove, 202-outer module, 203-spacer block, 2031-second cooling channel, 2032-honeycomb hole, 2033-air inlet duct, 2034-air outlet duct, 2035-pressure control valve. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0018] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0019] Example: Figure 1-3 As shown, a cooling mechanism for an aluminum profile extrusion mold includes a front mold 1 and a rear mold 2. The front mold 1 is provided with a mold core 102 and a diverter hole 101, and the rear mold 2 is provided with a welding chamber 2011 and a working belt 2012. The welding chamber 2011 is connected to the diverter hole 101, and the mold core 102 is located at the center of the welding chamber 2011.

[0020] like Figure 2 and Figure 3 As shown, the rear mold 2 includes an inner module 201 , an outer module 202 arranged outside the inner module 201 , and a spacer block 203 arranged between the inner module 201 and the outer module 202 . The welding chamber 2011 and the working belt 2012 are located on the inner module 201 .

[0021] The inner module 201 is connected to a water cooling mechanism, which includes a first cooling channel 2013 . The first cooling channel 2013 is arranged at the rear side of the welding chamber 2011 and is arranged around the outside of the working belt 2012 .

[0022] At least two first cooling channels 2013 are provided, which are spaced apart from each other in the front and back directions. In the present embodiment, the number of the first cooling channels 2013 is two.

[0023] The water cooling mechanism further includes an upper connecting channel 2015 and a lower connecting channel 2016. The upper connecting channel 2015 is arranged above the working belt 2012 and connected between the two first cooling channels 2013. A water outlet 2018 is arranged at the end of the upper connecting channel 2015 for discharging cooling water from the first cooling channel 2013.

[0024] The lower connecting channel 2016 is disposed below the working belt 2012 and connected between the two first cooling channels 2013 . A water inlet 2017 is disposed at the end of the lower connecting channel 2016 for introducing cooling water into the first cooling channel 2013 .

[0025] A cache cavity 2014 is provided at the upper end of the first cooling channel 2013 , and an upper connecting channel 2015 is connected between the front and rear cache cavities 2014 , wherein the width of the cache cavity 2014 is greater than the width of the first cooling channel 2013 .

[0026] Among them, the cross-sectional shape of the first cooling channel 2013 is rectangular, and the height of the first cooling channel 2013 gradually increases from the bottom of the working belt 2012 to the top. The height of the first cooling channel 2013 located below the working belt 2012 is less than its width, so that the cooling water in the first cooling channel 2013 located at the bottom of the working belt 2012 can quickly absorb the heat of the inner module 201 and heat up quickly. The first cooling channel 2013 located at the upper part of the working belt 2012 has a larger volume and accommodates more cooling water, and the water temperature rises relatively slowly, so that a certain convection is formed in the upper and lower parts of the cooling water. The cooling water with a faster temperature rise at the bottom floats up into the buffer cavity 2014 and is discharged through the upper connecting channel 2015, and is replenished with low-temperature cooling water by the lower connecting channel 2016, thereby ensuring that the water temperature in the first cooling channel 2013 is always at a low level, thereby better cooling the inner module 201.

[0027] The spacer block 203 is an annular sleeve, and the spacer block 203 is sleeved on the outside of the inner module 201. The spacer block 203 is connected with an air cooling mechanism, and the air cooling mechanism includes a second cooling channel 2031, and the second cooling channel 2031 is an annular groove concentric with the spacer block 203.

[0028] The air cooling mechanism also includes an air inlet duct 2033 and an air outlet duct 2034. The air inlet duct 2033 is connected to the lower end of the second cooling channel 2031, and the air outlet duct 2034 is connected to the upper end of the second cooling channel 2031. Air is introduced into the second cooling channel 2031 through the air inlet duct 2033 and discharged through the air outlet duct 2034, so that the second cooling channel 2031 always has air with a lower temperature, thereby forming an air insulation layer in the second cooling channel 2031 in the spacer block 203, reducing the heat transferred from the inner module 201 to the outer module 202.

[0029] The spacer block 203 is provided with honeycomb holes 2032, which radially penetrate from the second cooling channel 2031 to the inner wall of the spacer block 203. After the air enters the second cooling channel 2031, the air enters the gap between the inner surface of the spacer block 203 and the outer surface of the inner module 201 through the honeycomb holes 2032, forming an air layer, which further plays a role in heat insulation.

[0030] An air guide groove 2019 is provided on the outer wall of the inner module 201. The air guide groove 2019 penetrates to the rear end surface of the inner module 201 along the front-to-back direction, and is connected to the honeycomb holes 2032 at the corresponding position. A part of the air entering the gap between the inner surface of the spacer block 203 and the outer surface of the inner module 201 is discharged along the air guide groove 2019, and takes away the heat of the outer surface of the inner module 201. A pressure control valve 2035 is provided on the air outlet duct 2034, which is used to control the pressure in the second cooling channel 2031, so as to ensure that a certain amount of air is always maintained in the gap between the second cooling channel 2031 and the inner surface of the spacer block 203 and the outer surface of the inner module 201.

Claims

1. A cooling mechanism for an aluminum profile extrusion die, comprising a front die (1) and a rear die (2), wherein a die core (102) and a diverter hole (101) are provided in the front die (1), characterized in that: The rear mold (2) comprises an inner module (201), an outer module (202) arranged outside the inner module (201), and a spacer block (203) arranged between the inner module (201) and the outer module (202); a welding chamber (2011) and a working belt (2012) are arranged on the inner module (201); the inner module (201) is connected to a water cooling mechanism, the water cooling mechanism comprises a first cooling channel (2013), the first cooling channel (2013) is arranged at the rear side of the welding chamber (2011) and is arranged around the outside of the working belt (2012); the spacer block (203) is connected to an air cooling mechanism, the air cooling mechanism comprises a second cooling channel (2031), and the air cooling mechanism forms an air temperature insulation layer in the spacer block (203) through the second cooling channel (2031).

2. The aluminum profile extrusion die cooling mechanism according to claim 1, characterized in that: At least two first cooling channels (2013) are provided, which are spaced apart from each other in front and back.

3. The aluminum profile extrusion die cooling mechanism according to claim 2, characterized in that: The water cooling mechanism further comprises an upper connecting channel (2015) and a lower connecting channel (2016); the upper connecting channel (2015) is arranged above the working belt (2012) and connected between the two first cooling channels (2013); a water outlet (2018) is arranged at the end of the upper connecting channel (2015); the lower connecting channel (2016) is arranged below the working belt (2012) and connected between the two first cooling channels (2013); a water inlet (2017) is arranged at the end of the lower connecting channel (2016).

4. The aluminum profile extrusion die cooling mechanism according to claim 3, characterized in that: A cache cavity (2014) is provided at the upper end of the first cooling channel (2013), and the upper connecting channel (2015) is connected between the front and rear cache cavities (2014).

5. The aluminum profile extrusion die cooling mechanism according to claim 3 or 4, characterized in that: The cross-sectional shape of the first cooling channel (2013) is rectangular, and the height of the first cooling channel (2013) gradually increases from the bottom of the working belt (2012) to the top, and the height of the first cooling channel (2013) located below the working belt (2012) is smaller than its width.

6. The aluminum profile extrusion die cooling mechanism according to claim 1, characterized in that: The spacer block (203) is an annular sleeve, the spacer block (203) is sleeved on the outside of the inner module (201), and the second cooling channel (2031) is an annular groove concentric with the spacer block (203).

7. The aluminum profile extrusion die cooling mechanism according to claim 6, characterized in that: The spacer block (203) is provided with a honeycomb hole (2032), and the honeycomb hole (2032) radially penetrates from the second cooling channel (2031) to the inner wall of the spacer block (203).

8. The aluminum profile extrusion die cooling mechanism according to claim 7, characterized in that: An air guide groove (2019) is provided on the outer wall of the inner module (201), and the air guide groove (2019) penetrates to the rear end surface of the inner module (201) along the front-to-back direction, and the air guide groove (2019) is connected to the honeycomb holes (2032) at corresponding positions.

9. The aluminum profile extrusion die cooling mechanism according to claim 7, characterized in that: The air cooling mechanism further comprises an air inlet duct (2033) and an air outlet duct (2034), wherein the air inlet duct (2033) is connected to the lower end of the second cooling channel (2031), and the air outlet duct (2034) is connected to the upper end of the second cooling channel (2031), and a pressure control valve (2035) is provided on the air outlet duct (2034).

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